I am not complete, being unbiased (9)
I believe the answer is:
impartial
'being unbiased' is the definition.
('impartial' can be similar in meaning to 'unbiased')
'i am not complete' is the wordplay.
'i am' becomes 'I'm' (contraction).
'not complete' becomes 'partial' (I've seen this before).
'im'+'partial'='IMPARTIAL'
(Other definitions for impartial that I've seen before include "not taking sides" , "Fair, unprejudiced" , "Unbiased" , "Treating all rivals equally" , "Disinterested" .)